Electrooculography Electrode Layout for Individual Eye Detection
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Solution Overview
Problem
Conventional eye movement detecting devices cannot distinguish between the movements of the right and left eyes, as they are unable to differentiate whether the eyes move in the same or opposite directions.
Innovation Solution
An eye movement detecting device with electrodes placed strategically on the temples and nose pads of eyewear to detect eye potentials, allowing for the detection of horizontal and vertical movements of both eyes individually, using a neutral electrode to balance potential differences and improve signal-to-noise ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional eye movement detecting devices use simple electrode placement, then the device complexity is low, but the measurement precision is insufficient to distinguish between right and left eye movements
Solution Approach 1:
The patent divides the eye movement detection into separate channels for right and left eyes by placing distinct electrode pairs (first and second electrode pairs) on each eye. This segmentation allows independent detection of each eye's movement, enabling the system to distinguish between synchronized and divergent eye movements while maintaining manageable complexity through modular electrode placement
Solution Approach 2:
The patent applies local quality by placing electrodes at specific locations on the temples and nose pads close to each eye, with the first electrode pair positioned for the right eye and the second electrode pair positioned for the left eye. This localized electrode placement optimizes the detection of eye potentials for each eye individually, improving measurement precision without requiring complex overall device architecture
2Measurement precision
If more electrodes are added to detect individual eye movements, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The patent makes the electrode placement system universal by using a standardized configuration where the first and second electrode pairs can detect both horizontal and vertical eye movements through their respective channels. This multi-functional electrode arrangement allows the same basic structure to serve multiple detection purposes (right eye movement, left eye movement, synchronization detection) without proportionally increasing device complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Accurately detects horizontal and vertical movements of both eyes, enabling differentiation between synchronized and divergent eye movements, and provides insights into user conditions such as concentration and stress levels.
Implementation Method 1
As one technique of detecting an eye movement, there is electrooculography (EOG). In this technique, potentials of right eye and left eye (hereinafter referred as eye potentials) can be detected by attaching electrodes to the skin close to each of the right eye and the left eye.
Data Source
AI summary
According to one embodiment, an eye movement detecting device comprises first, second, third, fourth and fifth electrodes. A line connecting the first and the third electrodes passes through the right eye and a line connecting the second and the fourth electrodes passes through the left eye on at least one of a front view, a plan view or a side view. A distance between the fifth and the first electrodes is equal to a distance between the fifth and the second electrodes. A distance between the fifth and the third electrodes is equal to a distance between the fifth and the fourth electrodes. The detector respectively detects a horizontal movement of the right eye and a horizontal movement of the left eye.